直接上代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>爱淘气购物网－JQuery网页定位导航特效</title> <style> /*All tag*/ html, body, div, ul, li, img, h1, h2 { margin: 0; padding: 0; } ul { list-style: none; } a { text-decoration: none; color: #333; } /*menu*/ #menu { position: fixed; top: 100px; left: 50%; margin-left: 400px; } #menu>li>a { display: block; padding: 10px 15px; height: 30px; line-height: 30px; font-size: 14px; font-weight: bold; margin: 5px 0; } #menu>li>a:hover, #menu>li>a.current { color: #fff; background-color: #0088bb; } /*content*/ #content { width: 800px; margin: 30px auto; } h1 { color: #0088bb; font-size: 30px; margin-bottom: 10px; } .item { border: 1px dotted #0088bb; padding: 20px; margin-bottom: 20px; } .item>h2 { font-size: 16px; padding-bottom: 5px; border-bottom: 2px solid #0088bb; margin-bottom: 10px; } .item-list>li { display: inline-block; margin-right: 10px; } .item-list>li>a>img { width: 230px; height: 230px; border: none; } /* IE6 hack*/ * html, * html body { background-image: url(about:blank); background-attachment: fixed; } * html #menu { /*position: fixed*/ position: absolute; top: expression((e=document.documentElement.scrollTop ? e: document.body.scrollTop) + 100 + ‘px‘); } </style> </head> <body> <ul id="menu"> <li><a class="current" href="#item1">1F 男装</a></li> <li><a href="#item2">2F 女装</a></li> <li><a href="#item3">3F 美妆</a></li> <li><a href="#item4">4F 数码</a></li> <li><a href="#item5">5F 母婴</a></li> </ul> <div id="content"> <h1>爱淘气购物网</h1> <div id="item1" class="item"> <h2>1F 男装</h2> <ul class="item-list"> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a> </li> </ul> </div> <div id="item2" class="item"> <h2>2F 女装</h2> <ul class="item-list"> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a> </li> </ul> </div> <div id="item3" class="item"> <h2>3F 美妆</h2> <ul class="item-list"> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a> </li> </ul> </div> <div id="item4" class="item"> <h2>4F 数码</h2> <ul class="item-list"> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a> </li> </ul> </div> <div id="item5" class="item"> <h2>5F 母婴</h2> <ul class="item-list"> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> <li> <a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a> </li> </ul> </div> <div style="width: 100%;height: 1000px;"></div> </div> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script> <script> //定义getByClassName函数，让函数实现根据className获取对象并返回 function getByClassName(obj, cls) { var elements = obj.getElementsByTagName("*"); var result = []; for (var i = 0; i < elements.length; i++) { if (elements[i].className == cls) { result.push(elements[i]); } } return result; } //定义hasClass函数，确认对象是否包含对应的class function hasClass(obj, cls) { return obj.className.match(new RegExp("(\\s|^)" + cls + "(\\s|$)")); } //定义removeClass函数，让函数实现删除对象的class function removeClass(obj, cls) { if (hasClass(obj, cls)) { //remove var reg = new RegExp("(\\s|^)" + cls + "(\\s|$)"); obj.className = obj.className.replace(reg, ""); } } //定义addClass函数，让函数实现给对象增加class function addClass(obj, cls) { if (!hasClass(obj, cls)) { obj.className += " " + cls; } } //页面加载完毕执行以下函数 window.onload = function() { //页面滚动时，执行以下函数 window.onscroll = function() { var top = document.documentElement.scrollTop || document.body.scrollTop; var menus = document.getElementById("menu").getElementsByTagName("a"); var items = getByClassName(document.getElementById("content"), "item"); var currentId = ""; for (var i = 0; i < items.length; i++) { var _item = items[i]; var _itemTop = _item.offsetTop; if (top > _itemTop) { currentId = _item.id; } else { break; } } //给正确的menu下的a元素class赋值current if (currentId) { for (var j = 0; j < menus.length; j++) { var _menu = menus[j]; var _href = _menu.href.split("#"); if (_href[_href.length - 1] != currentId) { removeClass(_menu, "current"); } else { addClass(_menu, "current"); } } } } } </script> </body> </html>